diff --git a/test/simple/test-debugger-repl-utf8.js b/test/simple/test-debugger-repl-utf8.js
index 820a53914..308f6305e 100644
--- a/test/simple/test-debugger-repl-utf8.js
+++ b/test/simple/test-debugger-repl-utf8.js
@@ -76,12 +76,19 @@ function addTest(input, output) {
 }
 
 // Initial lines
-addTest(null, [
-  /listening on port 5858/,
-  /connecting... ok/,
-  /break in .*:1/,
-  /1/, /2/, /3/
-]);
+if (process.features.isolates) {
+  addTest(null, [
+    /break in .*:1/,
+    /1/, /2/, /3/
+  ]);
+} else {
+  addTest(null, [
+    /listening on port 5858/,
+    /connecting... ok/,
+    /break in .*:1/,
+    /1/, /2/, /3/
+  ]);
+}
 
 // Next
 addTest('n', [
diff --git a/test/simple/test-debugger-repl.js b/test/simple/test-debugger-repl.js
index df1b14298..a81da29e5 100644
--- a/test/simple/test-debugger-repl.js
+++ b/test/simple/test-debugger-repl.js
@@ -81,12 +81,19 @@ function addTest(input, output) {
 }
 
 // Initial lines
-addTest(null, [
-  /listening on port 5858/,
-  /connecting... ok/,
-  /break in .*:1/,
-  /1/, /2/, /3/
-]);
+if (process.features.isolates) {
+  addTest(null, [
+    /break in .*:1/,
+    /1/, /2/, /3/
+  ]);
+} else {
+  addTest(null, [
+    /listening on port 5858/,
+    /connecting... ok/,
+    /break in .*:1/,
+    /1/, /2/, /3/
+  ]);
+}
 
 // Next
 addTest('n', [